Product Overview

ManualsBrandsFebco ManualsBackflow Preventers4" LF860-OSY Reduced Pressure Zone Assembly (Lead Free)

ES-F-LF860L

MasterSeries

LF860

Reduced Pressure Zone

Backflow Prevention Assemblies

Size: 2

⁄2" - 10" (65mm - 250mm)

LEAD FREE

For Non-Health Hazard Applications

Job Name

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Contractor

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Job Location

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Approval

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Engineer

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Contractor’s P.O. No.

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Approval

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Representative

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FEBCO product specifications in U.S. customary units and metric are approximate and are provided for reference only. For precise measurements,

please contact FEBCO Technical Service. FEBCO reserves the right to change or modify product design, construction, specifications, or materials with-

out prior notice and without incurring any obligation to make such changes and modifications on FEBCO products previously or subsequently sold.

Series LF860 Reduced Pressure Zone Assembly

The FEBCO MasterSeries LF860 Reduced Pressure Zone

Assembly is specifically designed to protect against possible

backpressure and backsiphonage conditions for high hazard [i.e.,

toxic] application in accordance with Local Governing Water Utility

Code. This Backflow Prevention Assembly is primarily used on

potable drinking water systems where Local Governing Code

mandates protection from non-potable water being pumped or

siphoned back into the potable water system.

The LF860 features Lead Free* construction to comply with low

lead installation requirements. The Lead Free* Reduced Pressure

Zone Assemblies shall comply with state codes and standards,

where applicable, requiring reduced lead content.

Features

• Inline Serviceable Assembly

• No Special Tools Required for Servicing

• Captured Modular Spring Assembly

• Reversible & Replaceable Discs

• Field Replaceable Seats

• Ductile Iron Valve Body Design

• Stainless Steel Check Components

• Modular Pressure Differential Relief Valve

• Repairable Pressure Differential Relief Valve

• Clapper Check Assembly

• Captured O-ring Design

Specifications

The FEBCO MasterSeries LF860 Reduced Pressure Zone

Assembly shall be installed on the potable water supply and at

each point of cross-connection to protect against possible back-

pressure and backsiphonage conditions for high hazard [i.e.,

toxic] applications. The assembly shall consist of a main line valve

body composed of a pressure differential relief valve located in

a zone between two (2) independently acting approved clapper

style check modules with replaceable seats and disc rubbers.

Servicing of the pressure differential relief valve and both check

modules does not require any special tools; both check mod-

ules are accessed through independently top entry covers. This

assembly shall be fitted with AWWA Compliant inlet/outlet resilient

seated shutoff valves; when used on a Fire-Sprinkler application,

the assembly shall be fitted with approved UL/FM inlet/outlet

resilient seated shutoff valves and contain four (4) properly located

resilient seated test cocks as specified by AWWA Standard C511.

Flow and pressure loss performance parameters shall meet the

requirements of AWWA Standard C511.

*The wetted surface of this product contacted by consumable

water contains less than 0.25% of lead by weight.

NOTICE

Inquire with governing authorities for local installation requirements

NOTICE

The information contained herein is not intended to replace the

full product installation and safety information available or the

experience of a trained product installer. You are required to

thoroughly read all installation instructions and product safety

information before beginning the installation of this product.

Summary of content (4 pages)

PAGE 1
ES-F-LF860L For Non-Health Hazard Applications Job Name –––––––––––––––––––––––––––––––––––––––––––– Contractor ––––––––––––––––––––––––––––––––––––––––––––– Job Location –––––––––––––––––––––––––––––––––––––––––– Approval –––––––––––––––––––––––––––––––––––––––––––––– Engineer –––––––––––––––––––––––––––––––––––––––––––––– Contractor’s P.O. No.
PAGE 2
Options - Suffix Approvals - Standards OSY: • Approved by the Foundation for Cross-Connection Control and Hydraulic Research at The University of Southern California (FCCCHR-USC) UL/FM Approved OS&Y Gate Valves (ANSI/AWWA C515 Compliant) NRS: Non-Rising Stem Gate Valves (ANSI/AWWA C509 Compliant) • ASSE 1013 Listed LG: Less Shut-off valves; This is NOT an APPROVED ASSEMBLY • **UL Classified (US & Canada) Example Ordering Descriptions: • IAPMO • **FM Approved 4" LF860-OSY - Valve Assemb
PAGE 3
Dimensions & Weights Below are the nominal dimensions and physical weights for the Series LF860 size 21⁄2" through 10". Allowances must be made for normal manufacturing tolerances. Please visit our website to download a copy of this product’s installation instructions, or contact your local FEBCO Representative for more information. F** F** E* E* C C DD B B AA G H LF860 SIZE (DN) DIMENSIONS A B C D WEIGHT*** E* F** G H NRS OSY in. mm in. mm in. mm in. mm in. mm in. mm in.
PAGE 4
Performance Flow capacity chart identifies valve performance based upon rated water Velocity up to 20fps • Maximum service flow rate is determined by maximum rated Velocity of 7.5fps. • AWWA Manual M-22 (Appendix C) recommends that the maximum water Velocity in the services be not more than 10fps. • UL flow rate is determined by typically rated Velocity of 15 feet/sec.